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https://issues.apache.org/jira/browse/CASSANDRA-3530?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jonathan Ellis updated CASSANDRA-3530:
--------------------------------------
Affects Version/s: (was: 1.0.3)
0.8.0
Fix Version/s: 1.0.4
0.8.8
This affects 0.8 as well (and would have affected 0.7 if not for
CASSANDRA-3472).
> Header class not thread safe, but mutated by multiple threads
> -------------------------------------------------------------
>
> Key: CASSANDRA-3530
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3530
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.8.0
> Reporter: Sean Bridges
> Fix For: 0.8.8, 1.0.4
>
> Attachments: 3530-v2.txt, CASSANDRA-3530.patch
>
>
> With Cassandra 1.0.3 we are getting exceptions like,
> Fatal exception in thread
> Thread[WRITE-/xx.xx.xx.xx,5,main]java.util.ConcurrentModificationException
>
> at java.util.Hashtable$Enumerator.next(Unknown Source)
> at org.apache.cassandra.net.Header.serializedSize(Header.java:97)
>
> at
> org.apache.cassandra.net.OutboundTcpConnection.messageLength(OutboundTcpConnection.java:164)
> at
> org.apache.cassandra.net.OutboundTcpConnection.write(OutboundTcpConnection.java:154)
>
> at
> org.apache.cassandra.net.OutboundTcpConnection.writeConnected(OutboundTcpConnection.java:115)
>
> at
> org.apache.cassandra.net.OutboundTcpConnection.run(OutboundTcpConnection.java:94)
> and,
> ERROR [WRITE-/xx.xx.xx.xx] 2011-11-24 22:08:28,981
> AbstractCassandraDaemon.java (line 133) Fatal exception in thread
> Thread[WRITE-/10.30.12.79,5,main]java.lang.NullPointerException
> at org.apache.cassandra.net.Header.serializedSize(Header.java:101)
> at
> org.apache.cassandra.net.OutboundTcpConnection.messageLength(OutboundTcpConnection.java:164)
> at
> org.apache.cassandra.net.OutboundTcpConnection.write(OutboundTcpConnection.java:154)
> at
> org.apache.cassandra.net.OutboundTcpConnection.writeConnected(OutboundTcpConnection.java:115)
>
> at
> org.apache.cassandra.net.OutboundTcpConnection.run(OutboundTcpConnection.java:94)
> It looks like Header is not thread safe, but the same header instance is
> modified concurrently while being sent to several threads in
> StorageProxy.sendMessages.
> This bug eventually causes the node to OOM, as it kills the
> OutboundTcpConnection thread, which means nothing is dequeing from queue.
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